Aiming at the shortcomings of poor flexibility and heavy weight of common linear drives on the market, a pneumatic flexible three-muscle axial drive has been designed and developed.The theoretical analysis of the driver is carried out to obtain the formulas of driving force and air pressure, elongation and air pressure, and an experimental platform is built to verify the formula of the driver.Analyzing the difference between the theoretical value and the experimental value and drawing a conclusion,。Studies have shown that when the extension of the axial actuator is constant, the greater the air pressure, the greater the driving force. When the air pressure of the axial drive is constant, the greater the elongation, the smaller the driving force.the research provides a certain basis for the control and use of the axial drive in the future.